diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-16 07:03:00 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-19 05:32:44 +0400 |
| commit | dfc47ef8639facd77210e74be831943c2fdd9c74 (patch) | |
| tree | 5c7e9f93a999bf1d38b216af346ce2159e5f18ec /net/ipv4 | |
| parent | 464dc801c76aa0db88e16e8f5f47c6879858b9b2 (diff) | |
| download | linux-dfc47ef8639facd77210e74be831943c2fdd9c74.tar.xz | |
net: Push capable(CAP_NET_ADMIN) into the rtnl methods
- In rtnetlink_rcv_msg convert the capable(CAP_NET_ADMIN) check
to ns_capable(net->user-ns, CAP_NET_ADMIN). Allowing unprivileged
users to make netlink calls to modify their local network
namespace.
- In the rtnetlink doit methods add capable(CAP_NET_ADMIN) so
that calls that are not safe for unprivileged users are still
protected.
Later patches will remove the extra capable calls from methods
that are safe for unprivilged users.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/devinet.c | 6 | ||||
| -rw-r--r-- | net/ipv4/fib_frontend.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 6e06e924ed99..417093538916 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -539,6 +539,9 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg ASSERT_RTNL(); + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); if (err < 0) goto errout; @@ -646,6 +649,9 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg ASSERT_RTNL(); + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + ifa = rtm_to_ifaddr(net, nlh); if (IS_ERR(ifa)) return PTR_ERR(ifa); diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 825c608826de..bce4541c6784 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -613,6 +613,9 @@ static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *ar struct fib_table *tb; int err; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = rtm_to_fib_config(net, skb, nlh, &cfg); if (err < 0) goto errout; @@ -635,6 +638,9 @@ static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *ar struct fib_table *tb; int err; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = rtm_to_fib_config(net, skb, nlh, &cfg); if (err < 0) goto errout; |